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JBL Studio 6 66LCR vs JBL Studio 620 Comparison

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JBL Studio 6 66LCR

Passive In-wall | 45-20kHz

JBL Studio 6 66LCR
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JBL Studio 620

Passive Bookshelf | 50-40k Hz

JBL Studio 620
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JBL Studio 6 66LCR JBL Studio 6 66LCR
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JBL Studio 620 JBL Studio 620
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JBL Studio 6 66LCR
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JBL Studio 620
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JBL Studio 6 66LCR vs JBL Studio 620 Speaker Comparison

In this review, we will be comparing two different type of speakers by JBL. JBL Studio 6 66LCR is a In-wall speaker whereas the Studio 620 is a Bookshelf speaker.

Let's have a brief look at the main features of JBL Studio 6 66LCR and JBL Studio 620 first before getting into our more detailed comparison.

JBL Studio 6 66LCR Key Specs

  • 2-way Design
  • 1" Horn-Loaded Tweeter
  • 2 x 6.5" PolyPlas Woofer
  • 45-20kHz Frequency Response
  • 94 dB Sensitivity
  • Impedance: 6ohms
  • Power Range:10-150watts
  • Dimensions (H x W x D): 443.0" x 7.1250" x 3.7500"( 443.0 x 181.0 x 96.0mm )

JBL Studio 620 Key Specs

  • 2-way Design
  • 1" High Frequency Compression Tweeter
  • 5.25" PolyPlas Woofer
  • 50-40k Hz Frequency Response
  • 84 dB Sensitivity
  • Impedance: 6ohms
  • Power Range:up to 100watts
  • Weight:6.88kg
  • Dimensions (H x W x D): 312.0" x 7-1/2" x 9-1/2"( 190 x 240 x 312mm )

Studio 6 66LCR and Studio 620 are members of JBL's Studio series of speakers. Below you can find the loudspeakers from this series.

JBL Studio Series History
Model Body Frequency SensitivityImpedance Woofer
JBL Studio 630
  
Bookshelf 45-40k Hz 85 dB6Ω 1 x 6.25"
JBL Studio 620
Bookshelf 50-40k Hz 84 dB6Ω 1 x 5.25"
JBL Studio 680
  
Floor-standing 38-40k Hz 88 dB6Ω 2 x 6.5"
JBL Studio 690
  
Floor-standing 36-40k Hz 90 dB6Ω 2 x 8"
JBL Studio 6 88LCR
  
In-wall 43-20kHz 96 dB6Ω 2 x 8"
JBL Studio 2 55IW
  
In-wall 40-20kHz 88 dB8Ω 2 x 5.25"
JBL Studio 6 Theater
  
In-wall 65-20kHz 96 dB6Ω 4 x 5.25"
JBL Studio 6 66LCR
In-wall 45-20kHz 94 dB6Ω 2 x 6.5"
JBL Studio 6 Architectural 8IW
  
In-wall 43-20kHz 93 dB6Ω 1 x 8"
JBL Studio 2 8IW
  
In-wall 30-20kHz 88 dB8Ω 1 x 8"

What size room are the JBL Studio 6 66LCR and JBL Studio 620 speakers good for?

The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:

Listening Environment* JBL Studio 6 66LCR JBL Studio 620
Near-field Poor Average
Small Room Average Good
Mid-size Room Good Average
Large Room Average Poor
Very Large Room Poor Bad

(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2. Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)

In the following sections, we will get into more detail in order to better understand how the JBL Studio 6 66LCR and JBL Studio 620 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.


Drivers

Both Studio 6 66LCR and Studio 620 are 2-way speakers.

Driver JBL Studio 6 66LCR JBL Studio 620
Driver Setup 2-way 2-way
Tweeter 1-inch 1-inch
Midrange - -
Woofer 2 x 6.5-inch 1 x 5.25-inch

Studio 6 66LCR features a 1" Horn-Loaded Tweeter and 2 x 6.5" PolyPlas Woofer . On the other hand, the Studio 620 features a 1" High Frequency Compression Tweeter and 1 x 5.25" PolyPlas Woofer .

Frequency Response

Studio 6 66LCR has a frequency range of 45-20kHz whereas Studio 620 has a frequency range of 50-40k Hz. With a minimum frequency of 45Hz, the Studio 6 66LCR can go significantly deeper on the low side and provide stronger bass compared to the Studio 620's min frequency of 50Hz.

Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the In-wall class in our database.

Low Frequency

In-wall Speakers

Studio 6 66LCR
Studio 620
Min
Average
Max
High Frequency

In-wall Speakers

JBL Studio 6 66LCR
JBL Studio 620
Min
Average
Max

None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.

Impedance and Sensitivity

Studio 6 66LCR and Studio 620 have the same Impedance of 6 ohms but where they differ is the sensitivity levels. Studio 6 66LCR sensitivity is rated at 94 dB and the Studio 620's is at 84 dB. This 10 dB difference makes the JBL Studio 6 66LCR a more sensitive speaker compared to JBL Studio 620, hence will play louder with the same amount of watts.

Sensitivity

In-wall Speakers

Studio 6 66LCR
Studio 620
Min
Average
Max

Power Range

Power range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.

Studio 6 66LCR can handle a max power of 150 watts RMS from the amp the whereas Studio 620 has a max power handling value of 100 watts RMS, 50 watts less than the Studio 6 66LCR.

Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters such as Impedance, sensitivity and system efficiencies.

Input Type and Bi-Amping / Bi-Wiring

Studio 6 66LCR features 5-Way post type posts and Studio 620 has a 5-Way post type posts. None of these speakers feature bi-amping/bi-wiring.

Physical Specs

Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare JBL Studio 6 66LCR's and JBL Studio 620's external dimensions. JBL Studio 6 66LCR has external dimensions of 443.0 x 181.0 x 96.0mm ( 17.4375-inch x 7.1250-inch x 3.7500-inch) whereas JBL Studio 620 has external dimensions of 190 x 240 x 312mm ( 12.3 x 7-1/2inch x 9-1/2inch ) .

JBL Studio 6 66LCR is 9mm narrower and 144mm less deeper than JBL Studio 620 but it is also 131mm taller.

What's in the Box of JBL Studio 6 66LCR?

Here are the items that are included inside the box of Studio 6 66LCR:
  • In-wall loudspeaker
  • Grille
  • Cut-Out Template
  • Quick Start Guide
  • What's in the Box of JBL Studio 620?

    Here are the items that come with the Studio 620:
  • 2 x JBL Studio 630 Bookshelf Loudspeaker
  • 1 x Owner’s Manual
  • 1 x Warranty Card
  • 8 x Feet Pads

  • Reasons to choose JBL Studio 6 66LCR over JBL Studio 620
    Max Input Power 150 watts vs 100 watts Handle more power from your amplifier
    Sensitivity 94 dB vs 84 dB Play louder with same amount of amplification power
    Woofer Size 6.5 inches vs 5.25 inches Larger woofer
    Number of Woofers 2 vs 1 More woofers
    Low Frequency Response 45 Hz vs 50 Hz Generates deeper bass
    Base Surface Area 173cm2 vs 456cm2 Takes less floor space

    Reasons to choose JBL Studio 620 over JBL Studio 6 66LCR

    High Frequency Response 40k Hz vs 20k Hz Generates higher frequency
    Height 312mm vs 443mm Easier to fit in smaller spaces
    JBL Studio 6 66LCR vs JBL Studio 620 Specs Table
    Detailed comparison of specifications
    General JBL Studio 6 66LCR JBL Studio 620
    Brand JBL JBL
    Speaker Type Passive In-wall Speaker Bookshelf speakers
    Power Range 10-150 watts up to 100 watts
    Sensitivity 94 dB 84 dB
    Impedance 6 ohms 6 ohms
    Frequency Response 45-20kHz 50-40k Hz
    Drivers
    Woofer Quantity 2 1
    Woofer Size 6.5" 5.25"
    Woofer Composition PolyPlas PolyPlas
    Woofer Surround Material Rubber n/a
    Tweeter Size 1" 1"
    Tweeter Type Horn-Loaded High Frequency Compression
    Aimable Tweeter No No
    Midrange Driver N/A" No
    Firing Direction n/a rear
    Physical Specs
    Height 443.0mm (17.4") 312.0mm (12.3")
    Width 181.0mm (7.1") 190.0mm (7.5")
    Depth 96.0mm (3.8") 240.0mm (9.4")
    Weight n/a 6.88kg (15.1lbs)
    Enclosure In-wall Bass Reflex
    Finish n/a MDF/Wood veneer
    Available Colors n/a Wood, Dark Wood
    Mounting Bracket No
    Grille n/a Yes
    Moisture Resistancy No No
    Connections
    Biamp Inputs No No
    Other
    Parts Warranty 5 Years 5 Years
    Labor Warranty 5 Years 5 Years

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